Dufourea maura (Cresson)

(Figs. 1–2)

Panurgus maurus Cresson, 1878: 61 (“ ♀ ” = ♂).

Halictoides maurus (Cresson): Stevens, 1919: 205 (host records).

Dufourea (Halictoides) maura (Cresson): Michener, 1951: 1132 (catalog); Hurd, 1979: 1936 (catalog); Moure & Hurd, 1987: 20 (catalog).

Dufourea maura (Cresson): Dumesh & Sheffield, 2012: 20 (♀ ♂ redescription).

This distinctive species has been recorded from Isle Royale in Keweenaw County (Arduser, 1986), which is the northernmost part of the state. Dufourea maura has a boreal/alpine distribution which makes it unlikely to occur in the southern parts of Michigan. The bee is known from Ontario (Dumesh & Sheffield, 2012), but has not been recorded from any of the adjacent US states (e.g., Wolf & Ascher, 2009). Arduser (1986) reported 27 males and four females taken through the month of July (2 nd –27 th) in various years. Four additional males from Isle Royale, collected on June 30 th, 1965 were examined at MSUC (Fig. 24). Two recently collected specimens in the collection of S. Wilson are from the following sites on Isle Royale: Threemile trailhead, 48.122919, -88.531717, 11 July 2013 and Monkey Basin, 48.064075, -88.650183, 24 July 2013.

Dufourea maura is believed to be a specialist on Campanula rotundifolia L. ( Campanulaceae) (Stevens, 1919; Hurd, 1979; Lincoln, 1981; Arduser, 1986), which is widespread in the state of Michigan, occurring in 68 counties (Reznicek et al., 2011). Flight records range from June to mid August (Stevens, 1919).